Likewise Goji re stupid and inconvenient as somehow I've ended up with WAY too many credit cards and literally depending where I am ( office or home etc) or what cards just happen to be in my wallet ( as I do empty it if heading off somewhere so as not to carry / loose too many) the chances of me both remember which card I used to MAKE the booking and then also having that same card in my wallet at some random airport desk maybe 6 months later is usually NIL. As I said thankfully I've only been asked once ( and didn't have it but was able to prove my identity and it was a small local airport so I was allowed to travel. I'm not sure just how much it's actually helping stop crime anyway these days as now the fraudsters can literally print and indent themselves off a basically perfect copy of whatever card they wish within seconds of buying the stolen card details anyway.